2.3.1 Chronic tension-type headache associated with pericranial tenderness

A male factory technician reports the headache has been present on the large majority of days for several months, felt across both sides of his head. He says a typical spell can last from a few hours up to what feels like a whole day before it clears, and he rates the severity as mild to moderate, generally manageable enough to continue light duties. He notices tenderness when he presses over his own scalp, temples and the muscles either side of his neck. He has had no nausea, mild or otherwise, no vomiting, and does not notice any particular sensitivity to light or sound during an episode. He estimates approximately 17 days each month with headache, a pattern he says has been fairly constant for around four months.